Hamson



(Nuo Model.)

A. P. ABRAHAMSON.

- PUMP. No.'5'53,381. V Patented Jan. 21, 1896.Y

g I g I I zum 1 i i l l UNITED STATES PATENT OFFICE.

AXEL FREDRIK ABRAHAMSN, OF MADRID, SPAIN.

PUMP.

SPECIFICATION forming part of Letters Patent No. 553,381, dated January 21, 1896.

Applicationiiled March 9, 1895. Serial No. 541,159. (No model.) Patented in France January Z5, 1895, No. 242,177, and

Y in Germany April 19, 1895, No. 80,775.

To @ZZ whom t may concern.-

Be it known that 1, AXEL FEEDRIK ABRA- HAMSON, a subject of I'Iis Majesty the King of Sweden and Norway, and a resident of the city of Madrid, in the Kingdom of Spain, have invented certain new and useful Improvements in Pumps, (for which I have obtained Letters Patent of Germany, No. 80,7 7 5, dated April 19, 1395, and of France, No. 242,177, dated January 25, 1895 5) and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a central sectional view of my improved oscillating pump on the transverse vertical plane indicated by the broken line marked x 0c in Figs. 2 and 3. Fig. 2 is a longitudinal sectional view of the same on the vertical planes indicated by the broken line marked y y in Fig. 1. Fig. 3 is also a longitudinal sectional view at right angles to the axis of the pump onl the parallel planes indicated by the broken line marked 5 ,e in Fig.l 1; and Fig. 4 is a sectional detail view, on an enlarged scale, of the-upper stationary valve-4 seat on the horizontal plane indicated by the short broken line marked e" e', showing more clearly the construction and arrangement of the ducts for relieving the pump chambers and valves from sand and sediment that may have lodged therein.

Like letters of reference designate corre-l sponding parts in all the iigures.

My invention relates to improvements in oscillating pumps, or pumps of that class in which an oscillating shaft is journaled centrally in a cylindrical casing provided with inlet (suction) and outlet (delivery) ports, and corresponding suction and delivery pipes, said casin g being provided with interior radial partitions, while the oscillating shaft has a hub provided with radial wings or pistons extending to and bearing with their free ends against the interior circular wall of the cylin drical casing; and my improvement consists in the novel and peculiar construction and arrangement of the suction and delivery chambers and their appropriate valves, as also of the oscillating hub and the water-passages made therein, wherebyI produce a quadruple pump having two separate suction-chambers and two delivery-chambers in place of a single suction-chamber and single delivery chamber, as in the pump described and claimed by me in my Letters Patent of the United States No. 472,156, granted to me on the 5th day of April, 1892, on which my present invention constitutes an in'lportant improvement, inasmuch as a pump of my improved quadruple type will deliver twice as much water in a given time as a pump of the same dimensions constructed accordin gto the old or doubleacting plan, as described and claimed in my patent hereinbetore referred to.

On the accompanying drawings, the reference-letter A denotes the circular rim of the exterior cylindrical easing, and B B' the ends or heads of my improved oscillating pump. J ournaled centrally in these parallel circular heads is a shaft C, the bearings of which are provided with the -usual packing and stufin g boxes, and which may be oseillated by any suitable means, either by hand or power, as is usual in this class of pumps.

Mounted upon or formed in one piece with the shaft C is a hub D, having radial wings E E, the T-shaped ends or heads e e of which bear water-tight against the smooth inn er wall i of the pump-casing. This hub is also provided with two oblique water-passages f fand g g, which cross but are independent of each other, and connect, respectively, the interior chambers or compartments F F and G G',

which are formed within the pump-casing by the two ri gidly-inserted valve-seats H and I.

The upper valve-seat, I-I, is of a V shape, and faces with its broad open end the delivery-pipe b, while its lower end is ground oit' or concaved to lit t-he hub I). The lower valve-seat, I, is of the shape of an inverted Y, with its broad open end facing the suctionpipe a, while its stem is ground ott concavely to fit the opposite side of hub l). The upper valve-seat, II, is fitted with two valves 7L and h, hinged upon a common fulcrum-pin c in the crotch of the V, and the lower valve-seat, I, is similarly iitted with two valves z' and z", which swing upon separate iulcrum-pins d ICO and CZ', inserted through ears which project laterally from opposite sides ofthe stem.

The hollow interior of the upper valve-seat, II, forms a small compartment j, intermediate between the larger side compartments G and F', and opening to the outside through a short passage 7c bored through the casing-head B, which is normally closed by a headed screwstopper Z. In order to form a proper support or bearing for this stopper Z, the casing B is at this point thickened or reinforced byeboss Zr, and converging in the mouth of the outlet k, so as to be closed by the same stopper-head, are two oblique passages m and n, which communicate, respectively, with the interior chambers G and F on opposite sides of the valve-seat. As the chamber G communicates with chamber G through the hubpassage g, while the opposite chamber F similarly communicates with chamber F through the hub-passage f, it follows that all four compartments, as well as the interior of the stationary valve-seats, m'ay be opened to the outside through the ducts k, m and n simply by removing the headed screw-stopper Z, so that all sand and other impurities that collect and find lodgrnent in the pumpchambers and valve-seats may be expelled, and the whole interior of the pump thoroughly flushed and washed out by removing the stopper Z and working the pump-handle forward and back so as to oscillate the central shaft with its pistons in alternately opposite directions. As most of the sand, grit, and similar heavyimpurities contained in the water passing through the pump vwill iind a lodgment in the upper valve-seat, H, the interior chamber j of this can be flushed by pumping the whole length of the delivery-pipe full of water, and then opening the outlet Zo, when the head of water in the delivery-pipe will run down and out through the valve-cham berj and outlet Zo, thus thoroughly flushing and rinsing it out.

My improved pump possesses many important advantages over ordinary double-acting force-pumps with a vertically-reciprocating piston or plunger, among which may be mentioned the following, viz: considerably less friction between the wing-pistons and interior of the pump-casing. The wing-pistons are water-packed and balanced on op posite sides of the central hub, and require no expensive destructible leather or `:rubber packing. Sand and other impurities contained in the water will not affect the pump injuriously, and can easily be removed bythe means hereinbefore described. By centrally pivoting the wing-pistons I obtain an increased amount of leverage for working the pump, so that it will require a great deal less power to operate one of my improved pumps than an ordinary verticallyreciprocating double-acting force-pump of the same capac ity. Again, the water-pressure in operating my pump is always equally distributed on both sides of the pump, thus necessarily maintaining perfect equilibrium of both pistons, which results in a perfectly-balanced pump, with the well-known advantages of that construction. All of these important advantages are shared, however, to a greater or lesser extent, by my double-acting oscillating pump patented April 5, 1892; but an important advantage of my improved quadruple pump, hereinbefore described, over my old double-acting pump is its much greater capacity, resulting from constructing it with four separate pump-chambers connected in pairs by water-passages through the central oscillating hub, instead of two, whereby I double its capacity-4. e., deliver twice as much water within a given period of time as with a pump of my old construction.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States* In an oscillating pump of the described type, the combination with the vertical discharge-pipe Z?, valve-chamber j in alignment therewith, and pump-chambers G, F, on op posite sides of said valve chamber, of the obliquely-apertured casing-head B having boss Z9 and provided with the slanting and converging ducts m and n intersecting the central outlet of valve-chamberj; substantially as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

AXEL FREDRIK ABRf'lHAlllSON4 Iitnessesz ERIK WALEN, AXEL STEEN. 

